WO2022100767A1 - Cradle - Google Patents

Cradle Download PDF

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Publication number
WO2022100767A1
WO2022100767A1 PCT/CZ2021/050125 CZ2021050125W WO2022100767A1 WO 2022100767 A1 WO2022100767 A1 WO 2022100767A1 CZ 2021050125 W CZ2021050125 W CZ 2021050125W WO 2022100767 A1 WO2022100767 A1 WO 2022100767A1
Authority
WO
WIPO (PCT)
Prior art keywords
cradle
support part
linear actuator
linear
cradle body
Prior art date
Application number
PCT/CZ2021/050125
Other languages
French (fr)
Inventor
Adam Rumler
Original Assignee
Loonoy s.r.o.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Loonoy s.r.o. filed Critical Loonoy s.r.o.
Priority to EP21830591.0A priority Critical patent/EP4243657B1/en
Publication of WO2022100767A1 publication Critical patent/WO2022100767A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D9/00—Cradles ; Bassinets
    • A47D9/02—Cradles ; Bassinets with rocking mechanisms
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D9/00—Cradles ; Bassinets
    • A47D9/02—Cradles ; Bassinets with rocking mechanisms
    • A47D9/053—Cradles ; Bassinets with rocking mechanisms with curved rocking member
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D9/00—Cradles ; Bassinets
    • A47D9/02—Cradles ; Bassinets with rocking mechanisms
    • A47D9/057—Cradles ; Bassinets with rocking mechanisms driven by electric motors

Definitions

  • the invention relates to a cradle with an automatic rocking function.
  • the cradle is rocked using a motor, to the movable part of which a fixed rod, string, or other connecting element is attached, the other end of which is attached to the cradle, thus transferring the movement of the motor part to the rocking movement of the cradle.
  • the motor and the connecting element are external components that may be susceptible to damage due to exposure to the environment. For this reason, the external mechanism, or the entire cradle or cot, can be built into a box, which may, however, contribute to the space inefficiency of the entire structure or may complicate, for example, the repositioning of the cradle.
  • the automatic rocking can be implemented in a simple way in the case of cradles that comprise suspension arms by directly rotating the arms.
  • a disadvantage of these solutions lies in their unilaterality and therefore cannot be used with other types of cradles, for example, a cradle that does not comprise suspension parts, and its rocking movement is made possible by the curved shape of the cradle bottom or its supports.
  • cradles or cots that use permanent magnets for automatic rocking, as disclosed, for example, in the document CN2317744 Y.
  • the impulse for the rocking movement is given by the repulsive magnetic force between the two permanent magnets, wherein in addition to the magnets the device comprises a considerable number of other components (among them, for example, a shielding sleeve) and is generally characterised by a more complicated structure compared to simple mechanical solutions.
  • the patent document CN2242037U Y discloses a cot that uses periodic movement of a weight at the bottom part of the cot to change the position of the centre of gravity. The weight is placed on a pulley and an adjustable speed motor is used to rotate the pulley.
  • the patent document CN20175231 OU U discloses a baby cradle with automatic rocking function based on changing the position of the cradle’s centre of gravity, which takes advantage of the rotating movement of a rod structure in the bottom of the cradle. The rod is rotated by a motor and is provided with an iron weight at its end.
  • a cradle comprising a cradle body and a support part adapted to accommodate the cradle body and to rock the cradle, the essence of which is that the cradle further comprises a linear guide fixedly connected to the cradle body or the support part and a linear actuator comprising two mutually movable parts, the first part of which is connected to the cradle body and the second part of which is connected to the support part, wherein the linear guide provides mutual movement of the support part and the cradle body.
  • the cradle has a different position of the centre of gravity in each position of the relative movement of the support part and the cradle body.
  • rocking mechanism is a direct part of the cradle, no additional external components need to be used to rock the cradle, making said mechanism less susceptible to damage from environmental influences and also contributing to the space efficiency of the cradle.
  • rocking of the cradle is based on the principle of changing the centre of gravity of the cradle itself, which enables effective rocking of heavier and more stable structures.
  • the linear actuator preferably comprises a static part of the linear actuator and a movable part of the linear actuator, wherein the static part of the linear actuator is fixedly connected to the cradle body and the movable part of the linear actuator is connected to the support part.
  • the linear actuator is preferably implemented as a motor connected to a threaded rod provided with an external thread, wherein the motor comprises the static part of the linear actuator in the form of a stator fixedly connected to the cradle body and the movable part of the linear actuator in the form of a rotor rotatably movable relative to the stator and fixedly connected to the threaded rod, wherein the threaded rod is movably connected to the support part to provide sliding movement of the support part along the linear guide.
  • the mutual movement of the support part relative to the cradle body is implemented by simple mechanism using a motor that ensures automatic rocking.
  • the motor is preferably implemented as a stepper motor.
  • the stepper motor is characterised by its simple structure, low weight, and lower power consumption and price.
  • the use of a weaker and cheaper motor for the implementation of the mutual movement of the support part and the cradle body is made possible thanks to the above-mentioned rocking principle, which is based on the principle of changing the position of the centre of gravity of the cradle itself.
  • the support part preferably comprises two legs interconnected by cross members, wherein the cross members are movable along the linear guide and at least one of the cross members comprises a cavity provided with an internal thread, the profile of which is complementary to the profile of the external thread of the threaded rod, wherein the threaded rod at least partially passes through this cavity.
  • the threaded rod is a simple mechanical linkage that transmits the rotational movement of the rotor to the sliding movement of the cross members, thanks to which the change in the position of the centre of gravity of the cradle itself is implemented.
  • the linear actuator is implemented as a linear electromagnetic actuator and the movable part of the linear actuator is implemented as a rod, wherein the rod is fixedly connected to the support part.
  • the linear electromagnetic actuator e.g., a solenoid, is an inexpensive solution implementing the mutual sliding movement of the support part and the cradle body.
  • fig. 1 shows a cradle of a first exemplary embodiment of the present invention with a cradle body being shown in a longitudinal vertical section through the cradle body
  • fig. 2 shows the cradle of the first exemplary embodiment of the present invention without showing the cradle body
  • fig. 3 shows a detail of the cross members, the linear guide, and other functional components ensuring the mutual movement of the cross members along the linear guide according to the first exemplary embodiment of the present invention.
  • a cradle 1 comprises a cradle body 2 and a support part 3 adapted to accommodate the cradle body 2 and to rock the cradle 1.
  • the support part 3 in the first exemplary embodiment comprises two legs 13 which are interconnected on their top side by two cross members 14, wherein each leg 13 is implemented in the shape of a closed loop, the rounded shape of which allows the rocking movement of the cradle 1.
  • the legs 13 are further bevelled with respect to the vertical direction such that the distance between the legs 13 at their point of contact with the ground is greater than the distance between the legs 13 at the point of connection by the cross members 14, as shown in fig.
  • the cross members 14, connecting the top sides of the two legs 13, are positioned at a distance from each other to provide free space for placement of other functional components of the cradle 1 providing its automatic rocking, wherein these functional components are described in the following part of the text.
  • the cradle body 2 is open on the top side and its ovoid shape defines a cavity for the accommodation of a child, and the bottom of the cradle 1 for the accommodation of other functional components providing the automatic rocking of the cradle 1_.
  • the internal surface of the cradle body 2 is shaped to comprise a recess for insertion of a mattress, as shown in fig. 1.
  • the bottom of the cradle 1 further comprises openings on the lateral sides for inserting the support part 3, in particular for inserting the cross members 14.
  • the cradle body 2 or the support part 3 are implemented differently, provided that this implementation ensures separation of space for the accommodation of the child and the bottom of the cradle 1 such that neither the structure of the bottom of the cradle 1 nor other functional components accommodated in the bottom of the cradle 1 or the support part 3 interfere in any way with the space for the accommodation of the child or his/her comfort.
  • the functional components providing the automatic rocking of the cradle 1 are located in the bottom of the cradle 1 and comprise a linear guide 4 and a linear actuator 5.
  • the linear guide 4 is implemented as a pair of parallel rods which are fixedly connected at their ends to the cradle body 2 so that they traverse the bottom of the cradle T
  • the linear guide 4 is oriented in a direction parallel to the longitudinal axis of the cradle 1 and perpendicular to the cross members 14, wherein the individual rods of the linear guide 4 are positioned at a distance from each other to provide a free space for placement of the linear actuator 5.
  • the linear guide 4 is further provided with bearings 16, which are implemented such that they are in contact with the cross members 14 and allow the sliding movement of the cross members 14, or the support part 3, along the linear guide 4.
  • the mutual sliding movement of the support part 3 and the linear guide 4 is implemented using the linear actuator 5, which comprises a static part 6 of the linear actuator and a movable part 7 of the linear actuator.
  • the static part 6 of the linear actuator is fixedly connected to the cradle body 2, specifically to the bottom of the cradle 1.
  • the fixed connection of the linear actuator 5 to the cradle body 2 is provided by a bracket 12, which is fixedly connected to the static part 6 of the linear actuator and also to the cradle body 2.
  • the movable part 7 of the linear actuator is connected to the support part 3 such that its movement causes sliding movement of the support part 3 along the linear guide 4, wherein in each position of the mutual sliding movement of the support part 3 and the linear guide 4, the cradle 1 has a different position of the centre of gravity, which leads to a tilt of the cradle T
  • the rocking movement of the cradle 1 is provided, wherein the axis of rotation corresponding to the rocking movement of the cradle 1 is perpendicular to the longitudinal vertical plane of the cradle T
  • the linear actuator 5 is implemented as a motor 8 connected to a threaded rod 1 1 provided with an external thread.
  • the motor 8 comprises a stator 9 and a rotor 10 rotatably movable relative to the stator 9, wherein the stator 9 is fixedly connected to the cradle body 2 using the bracket 12.
  • the bracket 12 is in a preferred embodiment implemented in an L-shape, wherein the horizontal arm of the bracket 12 is fixedly connected to the cradle body 2 and the vertical arm of the bracket 12 is fixedly connected to the stator 9 and comprises an opening for the passage of a part of the rotor 10, as shown for example in fig. 3.
  • the bracket 12 is implemented differently, or the stator 9 is fixedly connected directly to the cradle body 2, provided that this implementation does not limit the function of the linear actuator 5 of providing the sliding movement of the cross members 14 along the linear guide 4.
  • the motor 8 is implemented as a stepper motor.
  • the motor is implemented as a different type of motor, provided that this implementation does not limit the function of the linear actuator 5 of providing the sliding movement of the cross members 14 along the linear guide 4.
  • the rotor 10 is fixedly connected to the threaded rod 1 1 so that the rotational movement of the rotor 10 is converted by this connection into a rotational movement of the threaded rod 1_1_, wherein the axis of the rotational movement of the rotor 10 matches the axis of the rotational movement of the threaded rod 1 1 .
  • one of the cross members is interrupted in the middle part and is connected at the point of this interruption by a prism 15.
  • the prism 15 comprises a cavity provided with an internal thread with a profile complementary to the profile of the external thread of the threaded rod 11 .
  • the cross members 14 are uninterrupted, wherein one of the cross members 14 comprises a cavity provided with an internal thread and the movement of the threaded rod 1 1 in the internal thread is implemented as described above.
  • the linear actuator 5 is implemented as a linear electromagnetic actuator, for example a solenoid, wherein the movable part 7 of the linear actuator is implemented as a rod passing through the solenoid.
  • the solenoid produces a magnetic field that pulls the rod into the solenoid.
  • the rod is further connected to the solenoid by a spring, wherein the force induced by this spring counteracts the force induced by the solenoid’s magnetic field and returns the rod to its original position.
  • the linear actuator 5 is implemented differently, provided that it enables a fixed connection of the static part 6 of the linear actuator to the cradle body 2 and a connection of the movable part 7 of the linear actuator to the support part 3 such that the support part 3 is slidingly movable along the linear guide 4.
  • the static part 6 of the linear actuator is fixedly connected to the support part 3 and the movable part 7 of the linear actuator is connected to the cradle body 2, provided that this implementation ensures sliding movement of the support part 3 along the linear guide 4.
  • the linear guide 4 is fixedly connected to the support part 3 and one of the parts of the linear actuator 5 is connected to the cradle body 2, provided that this embodiment ensures that the mutual movement of the support part 3 and the cradle body 2 is such that the cradle 1 has a different position of the centre of gravity in each position of the mutual movement of the support part 3 and the cradle body 2.
  • the cradle device described above can be used to provide automatic rocking of a cradle.

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  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Manipulator (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

The object of the invention is a cradle (1) comprising a cradle body (2) and a support part (3) adapted for accommodating the cradle body (2) and for rocking the cradle (1). The cradle (1) further comprises a linear guide (4) fixedly connected to the cradle body (2) or the support part (3) and a linear actuator (5) comprising two mutually movable parts, the first part of which is connected to the cradle body (2) and the second part of which is connected to the support part (3). The linear guide (4) ensures the mutual movement of the support part (3) and the cradle body (2), wherein the cradle (1 ) has a different position of the centre of gravity in each position of the mutual movement of the support part (3) and the cradle body (2).

Description

Cradle
Technical Field
The invention relates to a cradle with an automatic rocking function.
Background of the Invention
Today, there are numerous automatic cradle or cot rocking solutions that make the work of caregivers easier, wherein these solutions work on a variety of principles. In a common embodiment, the cradle is rocked using a motor, to the movable part of which a fixed rod, string, or other connecting element is attached, the other end of which is attached to the cradle, thus transferring the movement of the motor part to the rocking movement of the cradle. However, in most cases, the motor and the connecting element are external components that may be susceptible to damage due to exposure to the environment. For this reason, the external mechanism, or the entire cradle or cot, can be built into a box, which may, however, contribute to the space inefficiency of the entire structure or may complicate, for example, the repositioning of the cradle.
The automatic rocking can be implemented in a simple way in the case of cradles that comprise suspension arms by directly rotating the arms. A disadvantage of these solutions lies in their unilaterality and therefore cannot be used with other types of cradles, for example, a cradle that does not comprise suspension parts, and its rocking movement is made possible by the curved shape of the cradle bottom or its supports.
There are also cradles or cots that use permanent magnets for automatic rocking, as disclosed, for example, in the document CN2317744 Y. In this case, the impulse for the rocking movement is given by the repulsive magnetic force between the two permanent magnets, wherein in addition to the magnets the device comprises a considerable number of other components (among them, for example, a shielding sleeve) and is generally characterised by a more complicated structure compared to simple mechanical solutions.
Nowadays, there are also cradles or cots with automatic rocking function, which is based on the principle of changing the position of the centre of gravity of the cradle or cot itself. The patent document CN2242037U Y discloses a cot that uses periodic movement of a weight at the bottom part of the cot to change the position of the centre of gravity. The weight is placed on a pulley and an adjustable speed motor is used to rotate the pulley. The patent document CN20175231 OU U discloses a baby cradle with automatic rocking function based on changing the position of the cradle’s centre of gravity, which takes advantage of the rotating movement of a rod structure in the bottom of the cradle. The rod is rotated by a motor and is provided with an iron weight at its end.
The disadvantage of the two solutions mentioned above may in practice consist in ineffective rocking of the cradle. A problem could arise, for example, with cradles with a not very sharp bottom or cradles with a large weight, which are characterised by a more stable structure. In such a case, either a stronger motor or possibly a significantly heavier weight would be required for reliable rocking, which could be a disadvantage in terms of cradle handling.
Therefore, it would be advisable to come up with a solution that would not use any external components for the automatic rocking of the cradle, wherein the rocking mechanism would be characterised by a simple mechanical structure and would allow effective rocking of heavier cradles with a more stable structure.
Summary of the Invention
The above shortcomings are to some extent eliminated by a cradle comprising a cradle body and a support part adapted to accommodate the cradle body and to rock the cradle, the essence of which is that the cradle further comprises a linear guide fixedly connected to the cradle body or the support part and a linear actuator comprising two mutually movable parts, the first part of which is connected to the cradle body and the second part of which is connected to the support part, wherein the linear guide provides mutual movement of the support part and the cradle body. The cradle has a different position of the centre of gravity in each position of the relative movement of the support part and the cradle body.
As the rocking mechanism is a direct part of the cradle, no additional external components need to be used to rock the cradle, making said mechanism less susceptible to damage from environmental influences and also contributing to the space efficiency of the cradle. In addition, the rocking of the cradle is based on the principle of changing the centre of gravity of the cradle itself, which enables effective rocking of heavier and more stable structures.
The linear actuator preferably comprises a static part of the linear actuator and a movable part of the linear actuator, wherein the static part of the linear actuator is fixedly connected to the cradle body and the movable part of the linear actuator is connected to the support part. The linear actuator is preferably implemented as a motor connected to a threaded rod provided with an external thread, wherein the motor comprises the static part of the linear actuator in the form of a stator fixedly connected to the cradle body and the movable part of the linear actuator in the form of a rotor rotatably movable relative to the stator and fixedly connected to the threaded rod, wherein the threaded rod is movably connected to the support part to provide sliding movement of the support part along the linear guide. The mutual movement of the support part relative to the cradle body is implemented by simple mechanism using a motor that ensures automatic rocking.
The motor is preferably implemented as a stepper motor. The stepper motor is characterised by its simple structure, low weight, and lower power consumption and price. The use of a weaker and cheaper motor for the implementation of the mutual movement of the support part and the cradle body is made possible thanks to the above-mentioned rocking principle, which is based on the principle of changing the position of the centre of gravity of the cradle itself.
The support part preferably comprises two legs interconnected by cross members, wherein the cross members are movable along the linear guide and at least one of the cross members comprises a cavity provided with an internal thread, the profile of which is complementary to the profile of the external thread of the threaded rod, wherein the threaded rod at least partially passes through this cavity. The threaded rod is a simple mechanical linkage that transmits the rotational movement of the rotor to the sliding movement of the cross members, thanks to which the change in the position of the centre of gravity of the cradle itself is implemented.
Alternatively, the linear actuator is implemented as a linear electromagnetic actuator and the movable part of the linear actuator is implemented as a rod, wherein the rod is fixedly connected to the support part. The linear electromagnetic actuator, e.g., a solenoid, is an inexpensive solution implementing the mutual sliding movement of the support part and the cradle body.
Description of Drawings
A summary of the invention is further clarified using exemplary embodiments thereof, which are described with reference to the accompanying drawings, in which: fig. 1 shows a cradle of a first exemplary embodiment of the present invention with a cradle body being shown in a longitudinal vertical section through the cradle body, fig. 2 shows the cradle of the first exemplary embodiment of the present invention without showing the cradle body, and fig. 3 shows a detail of the cross members, the linear guide, and other functional components ensuring the mutual movement of the cross members along the linear guide according to the first exemplary embodiment of the present invention. Exemplary Embodiments of the Invention
The invention will be further clarified using exemplary embodiments with reference to the respective drawings.
In the first exemplary embodiment shown in figs. 1 to 3, a cradle 1 comprises a cradle body 2 and a support part 3 adapted to accommodate the cradle body 2 and to rock the cradle 1. The support part 3 in the first exemplary embodiment comprises two legs 13 which are interconnected on their top side by two cross members 14, wherein each leg 13 is implemented in the shape of a closed loop, the rounded shape of which allows the rocking movement of the cradle 1. The legs 13 are further bevelled with respect to the vertical direction such that the distance between the legs 13 at their point of contact with the ground is greater than the distance between the legs 13 at the point of connection by the cross members 14, as shown in fig. 2, thereby ensuring the stability of the cradle 1 and allowing it to be rocked safely. The cross members 14, connecting the top sides of the two legs 13, are positioned at a distance from each other to provide free space for placement of other functional components of the cradle 1 providing its automatic rocking, wherein these functional components are described in the following part of the text.
The cradle body 2 is open on the top side and its ovoid shape defines a cavity for the accommodation of a child, and the bottom of the cradle 1 for the accommodation of other functional components providing the automatic rocking of the cradle 1_. The internal surface of the cradle body 2 is shaped to comprise a recess for insertion of a mattress, as shown in fig. 1. Inserting the mattress into this recess creates two separate spaces, namely the cavity for the accommodation of the child, which is located in the space above the mattress, and the bottom of the cradle 1, which is located in the space below the mattress and is used to accommodate other functional components that ensure the automatic rocking of the cradle T The bottom of the cradle 1 further comprises openings on the lateral sides for inserting the support part 3, in particular for inserting the cross members 14. Alternatively, the cradle body 2 or the support part 3 are implemented differently, provided that this implementation ensures separation of space for the accommodation of the child and the bottom of the cradle 1 such that neither the structure of the bottom of the cradle 1 nor other functional components accommodated in the bottom of the cradle 1 or the support part 3 interfere in any way with the space for the accommodation of the child or his/her comfort.
The functional components providing the automatic rocking of the cradle 1 are located in the bottom of the cradle 1 and comprise a linear guide 4 and a linear actuator 5. In the first exemplary embodiment, the linear guide 4 is implemented as a pair of parallel rods which are fixedly connected at their ends to the cradle body 2 so that they traverse the bottom of the cradle T The linear guide 4 is oriented in a direction parallel to the longitudinal axis of the cradle 1 and perpendicular to the cross members 14, wherein the individual rods of the linear guide 4 are positioned at a distance from each other to provide a free space for placement of the linear actuator 5. The linear guide 4 is further provided with bearings 16, which are implemented such that they are in contact with the cross members 14 and allow the sliding movement of the cross members 14, or the support part 3, along the linear guide 4.
The mutual sliding movement of the support part 3 and the linear guide 4 is implemented using the linear actuator 5, which comprises a static part 6 of the linear actuator and a movable part 7 of the linear actuator. The static part 6 of the linear actuator is fixedly connected to the cradle body 2, specifically to the bottom of the cradle 1. In the first exemplary embodiment of the present invention, the fixed connection of the linear actuator 5 to the cradle body 2 is provided by a bracket 12, which is fixedly connected to the static part 6 of the linear actuator and also to the cradle body 2. The movable part 7 of the linear actuator is connected to the support part 3 such that its movement causes sliding movement of the support part 3 along the linear guide 4, wherein in each position of the mutual sliding movement of the support part 3 and the linear guide 4, the cradle 1 has a different position of the centre of gravity, which leads to a tilt of the cradle T By repeatedly deflecting the centre of gravity of the cradle 1 from its original, i.e., equilibrium, position using the linear actuator 5, the rocking movement of the cradle 1 is provided, wherein the axis of rotation corresponding to the rocking movement of the cradle 1 is perpendicular to the longitudinal vertical plane of the cradle T
In the first exemplary embodiment of the linear actuator 5, the linear actuator 5 is implemented as a motor 8 connected to a threaded rod 1 1 provided with an external thread. The motor 8 comprises a stator 9 and a rotor 10 rotatably movable relative to the stator 9, wherein the stator 9 is fixedly connected to the cradle body 2 using the bracket 12. The bracket 12 is in a preferred embodiment implemented in an L-shape, wherein the horizontal arm of the bracket 12 is fixedly connected to the cradle body 2 and the vertical arm of the bracket 12 is fixedly connected to the stator 9 and comprises an opening for the passage of a part of the rotor 10, as shown for example in fig. 3. Alternatively, the bracket 12 is implemented differently, or the stator 9 is fixedly connected directly to the cradle body 2, provided that this implementation does not limit the function of the linear actuator 5 of providing the sliding movement of the cross members 14 along the linear guide 4. In a preferred embodiment, the motor 8 is implemented as a stepper motor. Alternatively, the motor is implemented as a different type of motor, provided that this implementation does not limit the function of the linear actuator 5 of providing the sliding movement of the cross members 14 along the linear guide 4.
The rotor 10 is fixedly connected to the threaded rod 1 1 so that the rotational movement of the rotor 10 is converted by this connection into a rotational movement of the threaded rod 1_1_, wherein the axis of the rotational movement of the rotor 10 matches the axis of the rotational movement of the threaded rod 1 1 . Further, in the first exemplary embodiment of the linear actuator 5, one of the cross members is interrupted in the middle part and is connected at the point of this interruption by a prism 15. The prism 15 comprises a cavity provided with an internal thread with a profile complementary to the profile of the external thread of the threaded rod 11 . The external thread of the threaded rod 1 1 moves in this internal thread as a result of the rotational movement of the rotor 1.0, thereby providing a movable connection of the threaded rod 11 to this prism 15 and providing sliding movement of the cross members 14, or the entire support part 3, relative to the stator 9 along the linear guide 4. In an alternative embodiment, the cross members 14 are uninterrupted, wherein one of the cross members 14 comprises a cavity provided with an internal thread and the movement of the threaded rod 1 1 in the internal thread is implemented as described above. When the support part 3 is moved by the stepper motor, the operation of the stepper motor is reversed and it rotates alternately in one direction and the other, thus ensuring the automatic rocking of the cradle 1_.
In the second exemplary embodiment of the linear actuator 5, the linear actuator 5 is implemented as a linear electromagnetic actuator, for example a solenoid, wherein the movable part 7 of the linear actuator is implemented as a rod passing through the solenoid. When electric energy is applied, the solenoid produces a magnetic field that pulls the rod into the solenoid. By fixedly attaching the rod to the support part 3, for example to one of the cross members 14, it is possible to ensure the sliding movement of the support part 3 along the linear guide 4. The rod is further connected to the solenoid by a spring, wherein the force induced by this spring counteracts the force induced by the solenoid’s magnetic field and returns the rod to its original position. Alternatively, the linear actuator 5 is implemented differently, provided that it enables a fixed connection of the static part 6 of the linear actuator to the cradle body 2 and a connection of the movable part 7 of the linear actuator to the support part 3 such that the support part 3 is slidingly movable along the linear guide 4.
In a further exemplary embodiment, the static part 6 of the linear actuator is fixedly connected to the support part 3 and the movable part 7 of the linear actuator is connected to the cradle body 2, provided that this implementation ensures sliding movement of the support part 3 along the linear guide 4.
In a further exemplary embodiment, the linear guide 4 is fixedly connected to the support part 3 and one of the parts of the linear actuator 5 is connected to the cradle body 2, provided that this embodiment ensures that the mutual movement of the support part 3 and the cradle body 2 is such that the cradle 1 has a different position of the centre of gravity in each position of the mutual movement of the support part 3 and the cradle body 2.
Industrial Applicability
The cradle device described above can be used to provide automatic rocking of a cradle. List of Reference Numbers
1 - cradle
2 - cradle body
3 - support part
4 - linear guide
5 - linear actuator
6 - static part of the linear actuator
7 - movable part of the linear actuator
8 - motor
9 - stator
10 - rotor
11 - threaded rod
12 - bracket
13 - leg
14 - cross member
15 - prism
16 - bearing

Claims

CLAIMS A cradle comprising a cradle body and a support part adapted to accommodate the cradle body and to rock the cradle, characterised in that the cradle (1 ) further comprises a linear guide (4) fixedly connected to the cradle body (2) or a support part (3) and a linear actuator (5) comprising two mutually movable parts, the first part of which is connected to the cradle body (2) and the second part of which is connected to the support part (3), wherein the linear guide (4) provides the mutual movement of the support part (3) and the cradle body (2), wherein the cradle (1 ) has a different position of the centre of gravity in each position of the mutual movement of the support part (3) and the cradle body (2). The cradle of claim 1 , characterised in that the linear actuator (5) comprises a static part (6) of the linear actuator and a movable part (7) of the linear actuator, wherein the static part (6) of the linear actuator is fixedly connected to the cradle body (2) and the movable part (7) of the linear actuator is connected to the support part (3). The cradle of any one of the preceding claims, characterised in that the linear actuator (5) is implemented as a motor (8) connected to a threaded rod (1 1 ) provided with an external thread, wherein the motor (8) comprises the static part (6) of the linear actuator in the form of a stator (9) fixedly connected to the cradle body
(2) and the movable part (7) of the linear actuator in the form of a rotor (10) rotatably movable relative to the stator (9) and fixedly connected to the threaded rod (1 1 ), wherein the threaded rod (1 1 ) is movably connected to the support part (3) to provide sliding movement of the support part (3) along the linear guide (4). The cradle of claim 3, characterised in that the motor (8) is implemented as a stepper motor. The cradle of any one of the preceding claims, characterised in that the support part (3) comprises two legs (13) interconnected by cross members (14), wherein the cross members (14) are movable along the linear guide (4) and at least one of the cross members (14) comprises a cavity provided with an internal thread with profile complementary to the profile of the external thread of the threaded rod (11 ), wherein the threaded rod (1 1 ) passes at least partially through this cavity. The cradle of claim 1 , characterised in that the linear actuator (5) is implemented as a linear electromagnetic actuator and the movable part (7) of the linear actuator is implemented as a rod, wherein the rod is fixedly connected to the support part
(3).
PCT/CZ2021/050125 2020-11-10 2021-11-08 Cradle WO2022100767A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21830591.0A EP4243657B1 (en) 2020-11-10 2021-11-08 Cradle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV2020-607 2020-11-10
CZ2020607A CZ2020607A3 (en) 2020-11-10 2020-11-10 Cradle

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WO2022100767A1 true WO2022100767A1 (en) 2022-05-19

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EP (1) EP4243657B1 (en)
CZ (1) CZ2020607A3 (en)
WO (1) WO2022100767A1 (en)

Citations (4)

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US5037375A (en) * 1989-09-29 1991-08-06 Infant Advantage, Inc. Individual environmental control method
US5303433A (en) * 1993-06-25 1994-04-19 Jang Shuh Y Convertible rocking cradle
GB2312374A (en) * 1996-04-23 1997-10-29 Sher Afzal Rocking infant holder
US7485086B2 (en) * 2005-12-01 2009-02-03 3699013 Canada Inc. Rocking mechanism for children with associated sounds

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Publication number Priority date Publication date Assignee Title
JP3090406B2 (en) * 1994-09-21 2000-09-18 有限会社堀江企画 Automatic rocking device for infants
KR100393278B1 (en) * 2000-11-17 2003-08-06 최진태 Rocking-cradle for baby
KR101583377B1 (en) * 2014-06-12 2016-01-07 최영미 Electric swing bed

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5037375A (en) * 1989-09-29 1991-08-06 Infant Advantage, Inc. Individual environmental control method
US5303433A (en) * 1993-06-25 1994-04-19 Jang Shuh Y Convertible rocking cradle
GB2312374A (en) * 1996-04-23 1997-10-29 Sher Afzal Rocking infant holder
US7485086B2 (en) * 2005-12-01 2009-02-03 3699013 Canada Inc. Rocking mechanism for children with associated sounds

Also Published As

Publication number Publication date
EP4243657B1 (en) 2024-05-01
EP4243657A1 (en) 2023-09-20
CZ308832B6 (en) 2021-06-23
CZ2020607A3 (en) 2021-06-23

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